It seems that there are few things left to be researched as scientists have begun to investigate… happiness. What makes us happy? The eternal question has as many answers as there are people in this world. What have they come up with? Some ideas which seem instinctively obvious for most of us. But come on, if it has been scrutinised it must be true. And serious. Listen and find out for yourself. By Viola Lamot

Matt Killingsworth, a researcher at Harvard, has created an iPhone application at www.trackyourhappiness.org. Your cell phone surveys you several times a day on your level of happiness and tracks trends, then reports back to you on what makes you happy! Really cool and makes you feel spoiled – they ask you “So how do you feel right now?” several times a day. By Viola Lamot

Audio clip: Adobe Flash Player (version 9 or above) is required to play this audio clip. Download the latest version here. You also need to have JavaScript enabled in your browser.